Physics MCQs

Page No. 68

On loading the prong of a tuning form with wax its frequency____________________?


a increases


bdecreases


cremains unchanged


dmay increase or decrease


View Answer decreases

Increase in velocity of sound in the air for 1°C rise in temperature is_________________?


a1.61 ms-1


b 61.0 ms-1


c0.61 ms-1


d 2.00 ms-1


View Answer 0.61 ms-1

Sound waves do not travel in vacuum because ___________________?


athey are transverse waves


bthey are stationary waves


cthey require material medium for propagation


dthey do not have enough energy



It is possible to distinguish between transverse and longitudinal waves form the property of __________________?


a refraction


bpolarization


cinterference


ddiffraction


View Answer polarization

If stretching force T of wire increases, then its frequency __________________?


adecreases


bincreases


cremains the same


d any of above


View Answer increases

When two identical traveling waves are superimposed, the velocity of the resultant wave__________________?


adecreases


b increases


cremains unchanged


dbecomes zero


View Answer remains unchanged

The waves that require a material medium for their propagation are called__________________?


a matter waves


belectromagnetic waves


ccarrier waves


dmechanical waves


View Answer mechanical waves

Which phenomena can be applied to estimate the velocity of star with respect to earth


aDopplers effect


bInterference of waves


cBeats phenomena


dAll of these


View Answer Dopplers effect

The speed of stationary waves in a stretched string are independent of___________________?


aNumber of loops


bTension in the string


c Point where string is plucked


dboth A and C


View Answer both A and C

The speed of sound in hydrogen is _____________ time than that in oxygen?


aTwo times


bThree times


c Four time


dSix time


View Answer Four time

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